Would money or a cash prize help you to lose weight fast?

I ask this because there is a new study out that shows that people wanting to lose weight fast are possibly influenced by the possibility that they could win money if they lost the weight. 

Kevin G. Volpp, M.D., Ph.D., from the University of Pennsylvania School of Medicine and the Wharton School, VA Center for Health Equity Research and Promotion, Philadelphia, and colleagues, designed two incentive-based approaches for losing weight.

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